It's not really a book, but a classic 50 page notebook.
(just a white page with lines)
It's made for devices with a touchscreen or stylus pen, preferably color screen (but not necessary), and 640x480 pixel resolution or higher.

You have 50 dual sided pages (100 screens) to make notes upon.
I actually made this for the Jetbook Color, but perhaps other devices will accept this format too!

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I'm looking at some diaries patterns, backgrounds and page layouts.
I don't even know where to start... Problem is most photo backgrounds are copyrighted.
I need to find a place where I can find nice diary backgrounds for free, something in the open source section or something...

I'm assuming you'd want them to be fairly low on the compressed size range.

Are you looking for something just in the border image or are you open to other ideas? I could peruse some personal photos and doctor them appropriately (i.e. crop, desaturate, and scale accordingly) into more abstract or at least less-instrusive scenic backdrops. .

Yes, I can watermark photo's to become less visible.
Of course the book will become JPEGS,no longer the smaller gif format.
My wife's a photographer,she has some nice effect backgrounds she can share.
I'm still looking into options.
When I looked into diaries, I found 4 main types of them:

1- the simple one with just a color cover and white or colored plain papers (with or without lines)
2- Same as above, but with a border design on each page, leaving the center plain or with lines.
3- The one with a watermark as background photo (like a thinned out, semi-transparent photo), with or without lines.
4- Or watermark photo and page border decoration.

Of them, there are those that :
1- Have a single design throughout the whole book
2- Change design with every season, or every month
3- Have a same layout, or design, with different colors every so many pages
4- Have a different layout, different colors every x-pages

Either way those kinds of diaries take up long time to design, as well as should I create a 365 page design or more or less?
All these questions make me realize I don't have the time to be investigating and doing the project alone, by myself.

I could create a simple one, but what's the difference between a book with a soft pink background, and black or red lines and the notebook I just created?

I'm open to discussion, perhaps someone is able to convince me, but the way I see it now, is that it'll take a lot of my time, and I don't have the vision to be burdening something that takes that much of time, if it only can be used by a handful of people (if you get what I mean). Surely, if I had more time, or help, I'd make it!

I can build a steno pad in an hour or so, as long as it's without page numbers.
I'm currently working on a notebook like this one, for 640x480 pixels and see if it'll work out on the Jetbook Color.
Large spacing seems to work perfectly!